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MAX218
1.8V to 4.25V Powered, True RS-232 Dual Transceiver


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Data Sheet
FULL DATA SHEET (PDF, 93kB)
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Description
The MAX218 RS-232 transceiver is intended for battery-powered EIA/TIA-232E and V.28/V.24 communications interfaces that need two drivers and two receivers with minimum power consumption. It provides a wide +1.8V to +4.25V operating voltage range while maintaining true RS-232 and EIA/TIA-562 voltage levels. The MAX218 runs from two alkaline, NiCd, or NiMH cells without any form of voltage regulator.

A shutdown mode reduces current consumption to 1µA, extending battery life in portable systems. While shut down, all receivers can remain active or can be disabled under logic control, permitting a system incorporating the CMOS MAX218 to monitor external devices while in low-power shutdown mode.

A guaranteed 120kbps data rate provides compatibility with popular software for communicating with personal computers. Three-state drivers are provided on all receiver outputs so that multiple receivers, generally of different interface standards, can be wire-ORed at the UART. The MAX218 is available in 20-pin DIP, SO, and SSOP packages.

Key Features   Applications/Uses
BETTER THAN BIPOLAR!
  • Operates Directly from Two Alkaline, NiCd, or NiMH Cells
  • +1.8V to +4.25V Supply Voltage Range
  • 120kbps Data Rate
  • Low-Cost Surface-Mount Components
  • Meets EIA/TIA-232E Specifications
  • 1µA Low-Power Shutdown Mode
  • Both Receivers Active During Low-Power Shutdown
  • Three-State Receiver Outputs
  • Flow-Through Pinout
  • On-Board DC-DC Converters
  • 20-Pin SSOP, Wide SO, or DIP Packages

 
  • Battery-Powered Applications
  • Computers: Desktop, Workstation, Server
  • Instruments
  • Modems
  • Peripherals
  • Printers

    Key Specifications:   RS-232 Line Driver/Receivers
    Part Number Supply Voltage (V) Number of Tx Number of Rx Data Rate (kbps) Typ. ICC Current (mA) Internal Charge Pump Number of Ext. Caps Nom. Cap. Value (µF) Number of Rx Active in Shutdown Features RoHS Available Package Operating Temp. Range (°C) Price**
    MAX218  1.8 2 2 120 1.9 Yes 2 0.33/0.68 2
    Shutdown
    Three State Rx O/P
    True RS-232
    Yes PDIP/20
    SOIC/20
    SSOP/20
    -40 to +85
    0 to +70
    $1.92 @ 1k
    See All RS-232 Line Driver/Receivers (138)
    Notes:
    **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    Diagram
    MAX218: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  • Application Note 654: New RS-232 ICs Feature 1µA Supply Current, ±15kV ESD Protection, and 3V Operation - MAX218
  • Application Note 2141: Determining Clock Accuracy Requirements for UART Communications - MAX218

    Evaluation Kits
    none

    Design Guides
  • INTERFACE (PDF)

    Reliability Reports
  • Show FIT data for:
  • Request Reliability Report for:

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-19 of 19

    MAX218 Free
    Sample
    Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    MAX218C/D  
    DICE SALES;

    Use pkgcode/variation: DICE*
    See data sheet
    MAX218CPP+  
    PDIP;20 pin;
    Dwg: 21-0043D (PDF)
    Use pkgcode/variation: P20+4*
    0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX218EPP+  
    PDIP;20 pin;
    Dwg: 21-0043D (PDF)
    Use pkgcode/variation: P20+4*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX218CPP  
    PDIP;20 pin;
    Dwg: 21-0043D (PDF)
    Use pkgcode/variation: P20-4*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX218EPP  
    PDIP;20 pin;
    Dwg: 21-0043D (PDF)
    Use pkgcode/variation: P20-4*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX218CWP+  
    SOIC;20 pin;
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W20+2*
    0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX218CWP+T  
    SOIC;20 pin;
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W20+2*
    0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX218CWP-T  
    SOIC;20 pin;
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W20-2*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX218CWP  
    SOIC;20 pin;
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W20-2*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX218EWP  
    SOIC;20 pin;
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W20-2*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX218EWP-T  
    SOIC;20 pin;
    Dwg: 21-0042B (PDF)
    Use pkgcode/variation: W20-2*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX218EAP+T  
    SSOP;20 pin;
    Dwg: 21-0056C (PDF)
    Use pkgcode/variation: A20+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX218EAP+  
    SSOP;20 pin;
    Dwg: 21-0056C (PDF)
    Use pkgcode/variation: A20+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX218CAP  
    SSOP;20 pin;
    Dwg: 21-0056C (PDF)
    Use pkgcode/variation: A20-1*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX218CAP+T  
    SSOP;20 pin;
    Dwg: 21-0056C (PDF)
    Use pkgcode/variation: A20+1*
    0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX218CAP+  
    SSOP;20 pin;
    Dwg: 21-0056C (PDF)
    Use pkgcode/variation: A20+1*
    0°C to +70°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    MAX218CAP-T  
    SSOP;20 pin;
    Dwg: 21-0056C (PDF)
    Use pkgcode/variation: A20-1*
    0°C to +70°C RoHS/Lead-Free: No
    Materials Analysis
    MAX218EAP  
    SSOP;20 pin;
    Dwg: 21-0056C (PDF)
    Use pkgcode/variation: A20-1*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    MAX218EAP-T  
    SSOP;20 pin;
    Dwg: 21-0056C (PDF)
    Use pkgcode/variation: A20-1*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis

    Notes and Comments
  • Operates directly from batteries without a voltage regulator

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    Document Ref.: 19-0246; Rev 1; 1995-07-01
    This page last modified: 2007-07-17



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